Diesel Mechanic in Australia
Mining, Heavy Haulage & FIFO
The ultimate guide to becoming a Heavy Diesel Fitter. Explore apprenticeships (Mobile Plant), salaries up to $220k+, and high-demand FIFO roles.
Overview
Diesel Mechanics (also known as Diesel Fitters) are the heavy-hitters of the trade world. They maintain and repair the massive machinery that powers Australia's mining, construction, and transport industries.
Critical Shortage
One of Australia's most sought-after trades with an aging workforce.
Mining Boom
Massive demand for "Mobile Plant" mechanics in WA, QLD & NT.
Heavy Machinery
Work on excitng equipment like CAT dozers, Hitachi excavators & Kenworth trucks.
What Does a Diesel Fitter Do?
It's dirty, heavy, and technical work. You aren't just changing oil; you're rebuilding engines worth more than a house.
- Diagnosing & repairing diesel engines
- Servicing heavy vehicles and mobile plant
- Working on hydraulics, transmissions & drivelines
- Rebuilding engines & components
- Using laptop diagnostic tools & software
- Maintaining mining and earthmoving machinery
- Interpreting technical manuals and schematics
The Equipment
Diesel Mechanic Salary (2025)
Mining-focused diesel fitters are among the top-earning tradespeople in Australia.
| Experience Level | Salary / Rate Range |
|---|---|
| Apprentice (1st–4th year) | $16 – $28 / hr |
| Newly Qualified (Workshop) | $70,000 – $85,000 |
| Experienced Diesel Mechanic | $90,000 – $130,000 |
| Heavy Diesel Fitter (Field Service) | $120,000 – $150,000 |
| FIFO / Mining Fitter | $150,000 – $220,000+ |
Apprenticeship Pathway
Unlike some trades, there are three main pathways. Choose the one that fits your career goals.
Road Transport
Focuses on trucks and buses. Great for logistics and transport depots.
Mining & Earthmoving
Focuses on bulldozers, excavators, and haul trucks. Best for FIFO.
Engine Tech
Focuses specifically on diesel engine diagnostics and rebuilding.
Find Employer
Find a heavy haulage or civil earthmoving company to sign you up.
TAFE & Work
3-4 years of training. You'll learn hydraulics, electrics, and engines.
Qualify
Pass your assessments to get your Certificate III.
Advance
Move into Field Service or FIFO roles for maximum pay.
Looking for a Diesel Apprenticeship?
Use our free tool to search for Heavy Diesel positions by state.
Launch Apprenticeship Finder ToolLicences & Tickets
Diesel Mechanics generally don't need a trade licence, but operating tickets are crucial for moving the machines you fix.
Industry Requirements
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White Card Mandatory for all mine and construction sites.
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Heavy Rigid (HR) Licence Essential for road-testing trucks and service vehicles.
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Forklift (LF) Commonly used in workshops for heavy parts.
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Air-Con Licence Required to gas/degas vehicle A/C systems.
Training Providers
Core Qualification Providers
Most state TAFEs offer the AUR31220 Mobile Plant qualification.
Specialist Training
Look for OEM specific courses from Caterpillar (WesTrac/Hastings), Komatsu, and Hitachi for advanced career growth.
Where are the jobs?
Mining (WA/QLD)
Iron ore, coal, and gold mines are the biggest employers.
Civil Construction
Major infrastructure projects in Sydney & Melbourne.
Logistics
Keeping Australia's trucking fleet moving interstate.
Agriculture
Regional demand during harvest seasons.
FIFO Diesel Fitter
Earn $200k+ fixing big gear in the dirt.
FIFO Diesel Fitters are essential to mining operations. If a haul truck stops, the mine loses money. That's why they pay you top dollar to fix it fast.
Job Ready Checklist
- Cert III Qualification
- Heavy Rigid (HR) Licence
- White Card
- Working at Heights
- Police Check & Medical
Is it worth it?
The Good
- Very high earning trade
- Endless job demand & security
- Work on impressive machinery
- Clear path to Field Service / FIFO
The Challenges
- Dirty, greasy, oily environments
- Physically demanding & heavy lifting
- Complex fault-finding frustrations
- Working outdoors in heat/rain
Frequently Asked Questions
Is diesel mechanic a promising career?
Yes — it is one of the most secure and highest-paid mechanical trades. As long as trucks transport goods and mines dig earth, you will have a job.
Which specialization pays the most?
Mobile Plant (Mining) and Field Service roles pay the most. If you want the big money, focus on the AUR31220 qualification and getting onto a mine site.
Do diesel mechanics need a licence?
You don't need a specific state trade licence like an electrician, but you definitely need a Heavy Rigid (HR) driver's licence to road test vehicles.
How long is the apprenticeship?
Usually 3–4 years. It combines paid on-the-job training in a workshop with block-release training at TAFE.